#—*— codeing = utf-8 —*—
#@Time : 2022/9/15 10:18
#@Author :计科1813 38 和泽妮
#@File : 4.2.py
#@Software : PyCharm
f=open("a.txt","r",encoding="utf_8")
content=f.readlines()
i=1
for temp in content:
    print("%d:%s"%(i,temp))
    i+=1
f.close()